I ordered this Lipowarner on recommendation from a colleague. It works flawlessly. It is important when connecting that you plug in the balance Steckere to the negative terminal on the minus side of the Warners, otherwise it is not working. You will hear a beep. He then indicates only how much "S" (cells) If the connected Lipoakku concerns. Then, the Gesammtspannung of all cells and then always in the run, the voltage of each individual cell. Can by repeatedly pressing the appropriate voltage per cell set, at what voltage the minimum voltage alarm to go off at the rear little button. The alarm can also be heard on a larger distance. I have this on my guard Quadcopter Phantom attached with Velcro (see photos), so can I sobalt still good to fly back to the starting point triggers the alarm. I need therefore no longer paying attention to my flight times. Faziz: Top Product on Enem top price.